1. Bioorganic Chemistry Laboratory, Institut de recherches cliniques de Montréal (IRCM), Montréal, Québec H2W 1R7, Canada
2. Department of Chemistry, Université de Montréal, Montréal, Québec H3C 3J7, Canada
3. Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada